Taiyaki are fish shaped pancakes that is a very popular street food item in Japan. They are usually filled with red bean, custard, or chocolate.
I recently saw that the taiyaki maker is available on Amazon! Previously I purchased mine from Marukai, a japanese market. But I know not everyone has a Marukai and I have not seen them at other japanese markets.
The taiyaki maker is pretty simple to use. You put it on your stove to heat up and cook the pancakes and you flip it over to make sure both sides cook evenly.
You can use whatever your favorite pancake mix is for the batter and whatever filling you enjoy.
You can view the taiyaki maker here.